摘要
由于下垂环节对逆变器输出阻抗低频特性具有重要影响,对微网中下垂型逆变器并网电压以V_d轴定向,建立一种含功率环、电压环、电流环的阻抗模型,并通过阻抗扫描测试与阻抗模型测量对比验证模型的准确性,突破传统相量法分析时只侧重分析固定频率点50 Hz处的阻抗特性的局限性,阻抗模型不同参数下的稳定性判据与仿真对比,验证方法的正确性。
Since the droop loop has an important influence on the low-frequency characteristics of the inverter output impedance, an impedance model including power loop, voltage loop and current loop is established for the voltage of the grid-tied droop control inverter, which is oriented by the V_daxis. The accuracy of the model is verified through contrasting impedance sweep test and impedance model measurement. This method breaks through the limitations of traditional phasor method which only focus on analyzing the impedance characteristics at a fixed frequency point of 50 Hz. The stability criterion and simulation comparison under different parameters of the impedance model verify the correctness of the method.
作者
赵巍
赵路
孙孝峰
齐磊
王士豪
张梦菊
Zhao Wei;Zhao Lu;Sun Xiaofeng;Qi Lei;Wang Shihao;Zhang Mengju(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province,Yanshan University,Qinhuangdao 066004,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第8期2335-2345,共11页
Acta Energiae Solaris Sinica
基金
国家重点研发计划(2016YFB0900300)
国家自然科学基金(51677162
51407155)
河北省自然科学基金(E2017203337)
关键词
阻抗
稳定性
奈奎斯特图
逆变器阻抗模型
阻抗测量
下垂控制
impedance
stability
Nyquist diagrams
inverter impedance model
impedance measurement
droop control
